Socket for tubular lamps



M. CHALIER. SOCKET FOR TUBULAR LAMPS. APPLICATION FILED JULY 10, 1914.

1,389,740. PatentedSept. 6,1921.

UNITED STATES PATENT OFFICE.

MARC CHALIER, OF PARIS, FRANCE.

SOCKET FOR TUBULAR LAMPS.

Application filed July 10, 1914.

' Specification of Letters Patent.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1921, 41 STAT. It, 1313.)

T 0 all whom it may concern:

Be it known that I, MARo CHALIER, a citizen of the Republic of France, residing at Paris, in the Republic of France, have invented certain new and useful Improvements in Sockets for Tubular Lamps, of which the following is a specification.

This invention relates to a socket for tubular lamps.

The invention consists in combination with a reflector-channel of zinc or other material forming in usual manner foot-lights or floats, of specially arranged insulating sockets for the lamps provided at regular intervals in said reflector-channel, a movable pin or resilient contact being contained in each of said sockets, so that the socket proper makes contact with the electric central contact lamp and the movable pin or resilient contact with the following glow lamp. Each lamp is thus connected between the fixed top of an insulating socket and the movable pin of the following socket. The sockets have their contacts connected alternately with each pol of the current supply. The channel constituting the footlights or floats have their edges rounded in order to form two channels, in which each of the conducting wires of the current is provided.

A very practical mounting or fitting is thus obtained in a very simple and economical manner, whereby it is possible to easily make the necessary connections and to replace the damaged lamps.

Difierent constructions have become known for the same purpose, in which constructions, spring contacts are used for connecting tubular lamps. All these constructions, however, are not reliable and consequently have not proved satisfactory in practice.

In the accompanying drawing, which shows a construction of the invention by way of example, and in which similar numbers of reference relate to corresponding parts throughout the several views,

Figure 1 is a plan of a part of the footlights channel arranged according to the invention,

Fig. 2 is a cross section on an enlarged scale through one of the insulating sockets of the foot-lights, and

Fig. 3 is a front elevation with a cross section through the foot-lights.

Referring now to the drawing the usual channel 1, of zinc or similar material form ing the foot-lights is provided with two grooves 2 at the edges adapted to receive the conducting wire 3.

There are provided in the channel 1 at regular intervals insulating sockets 4 preferably of wood and provided with cylindrical central recesses or bearings 5 intended for holding the neck or collar 6 of a central contact glow lamp. In the center of the socket 4 1s provlded a plunger-contact consisting of a casing or bushing 8 provided at the one of its extremities with a flat head 8 embedded in the one recess or bearing 5 of the socket 4, while its movable pin or resilient plunger 8 extends outwardly into the second bearing 5 of the socket. The casing or bushing 8 is secured in the socket 4 by a nut 9, screwed upon an outer thread of said bushing 8. Said nut 9 which may be tightened by a spanner simultaneously secures in its position the extremity of the conducting wire which crosses the socket 4 through a lateral duct 11 communicating with the inner side of one of the grooves 2 of the foot-lights, in order to be connected with the wire 3 which is contained therein.

As is obvious from the drawing, each of.

the sockets 4 of two successive lamps 7 serves as a pole and, consequently, the sockets must be alternately connected with one of the wires 3 and also with the opposite wire (Fig. 1). The socket 4 is fixed in the channel by the screws 12 and the distance from two successive sockets 4 corresponds to the length of the electric lamp 7 As is obvious especially from Fig. 2, each lamp 7 is connected by an end piece on the flat immovable head 8 of the plunger-contact and on the other side on the pin 8 of the casing or bushing 8 of the plunger-contact of the following socket, in that it is connected at each end to a different pole of the current supply.

I claim:

A solid socket made of one piece of insulating material adapted to be positioned in a channel forming foot-lights, said socket having recesses in its ends to support tubular lamps, a metallic bushing extending longitudinally through said socket and having a fiat head located in one of said recesses and a yieldable plunger contained therein and extending into the other recess, a tightening nut located in a cavity of this recess and threaded on the bushing to fix the latter in position, an opening in said socket leading into said cavity of the recess containing said nut, which holds the end of one of the leads or electric Wires intended to supply current and passing through said openingto said cavity of the recess, the other end of the Wiring being connected to the conducting Wire arranged in a groove at one edge of said channel. 7

In testimony whereof I aflix my signature in presenceoftwo Witnesses. I MARC OHALIER. Witnesses: V 7

Grass. P. PRESSLY,

C. N. Rossmn. 

